英语：Also、 Too 、Either—“也”的用法

英语基础太差了，连这三个最简单的单词的用法也经常也搞不清楚。不过从今天开始，希望这将不再是问题。
这三个词都是“也”的意思，但在用法上有所不同：

Also

用法：
“Also” 用在肯定句中。
Examples:

• Jane speaks French. Sam also speaks French.
• I love chocolate. I also love pizza.
• Frank can come with us. Nancy can also come with us.

位置
“Also”跟在 “to be.”之后。
Examples:

• I am also Canadian.
• I was also there.

除了跟在 “to be.”之后， “also” 应放在单个动词之前。
Examples:

• I also sing.
• He also helped us.

在复杂动词时态语句中, “also” 放在构成时态的第一部分之后，第二部分之前。
Examples:

• I have also been to Hong Kong.
• I am also studying economics.

同样, 由于情态动词通常紧接动词，”also” 应放在情态动词之后。
Examples:

• I can also speak French.
• I should also be there.

Too

用法
“Too” 用于肯定句，但一般放在名尾。
Examples:

• Jane speaks French. Sam speaks French too.
• I love chocolate. I love pizza too.
• Frank can come with us. Nancy can come with us too.
• I am Canadian too.
• I can speak French too.
• I am studying economics too.
• If he wants to go too, he should meet us at 8:00.

注意：
尽管”too”通常情况下放在句子最后。但有时可以用逗号分隔后放在句子的主语之后。
Examples:

• Mr. Jones wanted the contract. Ms. Jackson, too, thought it was necessary.
• Donna is working on a solution to the problem. I, too, am trying to find a way to resolve the conflict.

Either

用法
“Either” 用在否定句中。
Examples:

• Jane doesn’t speak French. Sam doesn’t speak French either.
• I don’t love chocolate. I don’t love pizza either.
• Frank cannot come with us. Nancy cannot come with us either.

位置
“Either” 通常放在句尾。
Examples:

• I cannot speak French either.
• I am not studying economics either.
• I don’t want to eat either.
• I didn’t like the movie either.

易混淆的情况

有时句子前部分是否定的，而含“也”的部分是肯定的。
Examples:

• The weather wasn’t very appealing. I also wanted to stay home and finish my book. That’s why I didn’t go to the beach.
• The car wasn’t expensive, and I needed a way to get around town too. That’s why I bought it.

有时句子前部分是肯定的，而含“也”的部分是否定的。
Examples:

• • Jane is too short. She is not a good athlete either. I don’t think she would make a good basketball player.
  • He is lazy. He doesn’t study either. That’s why he doesn’t do well in school.